iio: adc: ltc2496: provide device tree binding document

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/iio/adc/lltc,ltc2496.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Linear Technology / Analog Devices LTC2496 ADC

maintainers:

 - Lars-Peter Clausen <lars@metafoo.de>

 - Michael Hennerich <Michael.Hennerich@analog.com>

 - Stefan Popa <stefan.popa@analog.com>

properties:

  compatible:

    enum:

      - lltc,ltc2496

  vref-supply:

    description: phandle to an external regulator providing the reference voltage

    allOf:

      - $ref: /schemas/types.yaml#/definitions/phandle

  reg:

    description: spi chipselect number according to the usual spi bindings

  spi-max-frequency:

    description: maximal spi bus frequency supported

required:

  - compatible

  - vref-supply

  - reg

examples:

  - |

    spi {

        #address-cells = <1>;

        #size-cells = <0>;

        adc@0 {

            compatible = "lltc,ltc2496";

            reg = <0>;

            vref-supply = <&ltc2496_reg>;

            spi-max-frequency = <2000000>;

        };

    };